Re: [Gnuplot-py-users] 2d and 3d plot together

[Michael H. <mh...@al...>]

[Please always CC your replies to the mailing list as well.]

On 10/24/2013 09:35 AM, Tomáš Odstrčil wrote:
> It is possible to do it in gnuplot, I'm using the following command (the
> last line is important)
>   set xrange [1:5];
>     set yrange [-2:2];
>     set style line 1 lt 2 lc rgb 'white' lw 2;
>     set style line 2 lt 1 lc rgb 'gray' lw 1;
>     set title 'title';
>     set xlabel 'xlabel
>     set ylabel 'ylabel'
>     unset key
>     set term png transparent  size 600,600 crop;
>     set output 'filename.png';
>     set view map;
>     set pm3d explicit;
>     splot 'data.txt' with image, 'line.txt' using 1:2:(0)  ls 1  with lines

Ahh, I see, you are doing a "2-d" line plot by doing a 3-d line plot
whose z values are always zero.  The same trick works in Gnuplot.py:

    import math, numpy
    import Gnuplot
    g = Gnuplot.Gnuplot()
    theta = numpy.arange(-math.pi, math.pi, 0.1)
    x = numpy.cos(theta)
    y = numpy.sin(theta)
    g.splot(
        Gnuplot.Func('x*x + y*y'),
        Gnuplot.Data(x,y, using='1:2:(0)', with_='line'),
        )

or you can pass the zero data to gnuplot explicitly using something like

    g.splot(
        Gnuplot.Func('x*x + y*y'),
        Gnuplot.Data(x,y,numpy.zeros(len(t)), with_='line'),
        )


Michael

-- 
Michael Haggerty
mh...@al...
http://softwareswirl.blogspot.com/